Ivan Breslavetz and Clément Faugeras, LNCMI Grenoble. To flesh out the phase diagrams of novel material systems, researchers must examine these materials under extreme conditions. We have designed an experimental setup for optical spectroscopy that simultaneously offers three extremes: low temperature, a strong magnetic field, and high pressure imposed by [...]
Paragraf™ has leveraged its expertise in the manufacturing & implementation of graphene technology to make another major advance in Hall-sensor performance. The company has announced the availability of a new sensor range capable of unmatched sensitivity and linearity when placed in low-temperature environments and in strong magnetic fields. Tested at [...]
Toni Helm, HLD Dresden. Currently, a group of semimetals excites the physics community due to its intriguing properties derived from massless chiral particles— so-called Weyl fermions. As a consequence of linear band crossings at the Fermi energy and a high Fermi velocity, massless Weyl states can be the origin of [...]
Jake Ayres, University of Bristol, Maarten Berben and Nigel Hussey, HFML Nijmegen. Researchers from HFML-EMFL, UK, Netherlands, and Japan studied the high-field magnetotransport properties of overdoped high-Tc cuprates and found behavior that is strikingly different from that of ordinary metals. For the latter, the resistivity increases quadratically with temperature and [...]
Piotr Kapuściński and Marek Potemski, LNCMI Grenoble. Strong Coulomb correlations together with multi-valley electronic bands in the presence of spin-orbit interaction are at the heart of studies of the rich physics of excitons in semiconductor structures made of monolayers of transition-metal dichalcogenides (TMD). These archetypes of two-dimensional systems promise the [...]
Stanislaw Galeski, MPI CPfS Dresden and Sergei Zherlitsyn, HLD Dresden. The quantum Hall effect (QHE) is traditionally considered to be a purely two-dimensional (2D) phenomenon. Recently, however, a three-dimensional (3D) version of the QHE was reported in the Dirac semimetal ZrTe5. Researchers from Germany, USA, and Sweden have now succeeded [...]
Timo Neumann, Felix Deschler, TU Munich and Mateusz Dyksik, Paulina Plochocka, LNCMI Toulouse. Hybrid metal-halide perovskites offer the opportunity for a novel control of spins in a high-performance semiconductor due to their exceptional tolerance to structural defects and impurities, combined with their production as polycrystalline thin films and nanostructures from [...]
Igor Vinograd and Marc-Henri Julien, LNCMI Grenoble. The ubiquity of charge-density waves (CDW) in cuprate superconductors is now well established, but the mechanism responsible for their formation remains debated. The generic aspects of the microscopic structure of the CDW are not settled yet. In this work, we used 17O nuclear [...]
Matija Čulo, Salvatore Licciardello, and Nigel Hussey, HFML. Researchers from HFML, UK, USA, and Japan have carried out a detailed magnetotransport study of the electronic nematic superconductor FeSe1-xSx that reveals key signatures of the so-called ‘strange metal’ behavior in vicinity of its nematic quantum critical point (QCP) xс ≈ 0.17. [...]
Tatsuya Yanagisawa, Hokkaido University and Sergei Zherlitsyn, HLD Dresden. Researchers from Japan and the Czech Republic, together with scientists from the HLD, have succeeded in identifying that electric quadrupoles play an important role in the magnetic order of the honeycomb-layer compound UNi4B. The scientists showed that these quadrupoles maintain their [...]